Universal Quantum Estimator

Preprint

12 December 2001

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.quant-ph/0112073

Abstract

We present a simple device based on the controlled-SWAP gate that performs quantum state tomography. It can also be used to determine maximum and minimum eigenvalues, expectation values of arbitrary observables, purity estimation as well as characterizing quantum channels. The advantage of this scheme is that the architecture is fixed and the task performed is determined by the input data.

Keywords

QUANTUM STATE TOMOGRAPHY
ARBITRARY OBSERVABLES
MINIMUM EIGENVALUES
UNIVERSAL QUANTUM
QUANTUM ESTIMATOR
SIMPLE DEVICE
ARCHITECTURE
TOMOGRAPHY
SWAP GATE

All Related Versions

Version 1, 2001-12-12, ArXiv
Version 1, 2004-10-24, ArXiv (Unconfirmed version)
Published version: Physical Review Letters, 88 (21), 217901.

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